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Transplant immunology

Christelle Retière, Catherine Willem, Thierry Guillaume, Henri Vié, Laetitia Gautreau-Rolland, Emmanuel Scotet, Xavier Saulquin, Katia Gagne, Marie C Béné, Berthe-Marie Imbert, Beatrice Clemenceau, Pierre Peterlin, Alice Garnier, Patrice Chevallier
We have compared prospectively the outcome and immune reconstitution of patients receiving either post-transplant cyclophosphamide (PTCY) ( n = 30) or anti-thymocyte globulin ATG ( n = 15) as Graft-versus-host disease (GVHD) prophylaxis after reduced-intensity conditioning (RIC) allogeneic peripheral blood stem cell (PBSC) transplantation (allo-SCT). The outcome and immune reconstitution of patients receiving either of these two regimens were compared prospectively. This study allowed also to investigate the impact of PTCY between haplo-identical vs matched donors and of clofarabine as part of the RIC regimen...
February 20, 2018: Oncotarget
Nicolle H R Litjens, Lotte van der Wagen, Jurgen Kuball, Jaap Kwekkeboom
Cytomegalovirus (CMV) infection can cause significant complications after transplantation, but recent emerging data suggest that CMV may paradoxically also exert beneficial effects in two specific allogeneic transplant settings. These potential benefits have been underappreciated and are therefore highlighted in this review. First, after allogeneic hematopoietic stem cell transplantation (HSCT) for acute myeloid leukemia (AML) using T-cell and natural killer (NK) cell-replete grafts, CMV reactivation is associated with protection from leukemic relapse...
2018: Frontiers in Immunology
JooYeon Jhun, Seung Hoon Lee, Soon Kyu Lee, Hee Yeon Kim, Eun Sun Jung, Dong Goo Kim, JeongWon Choi, Si Hyun Bae, Seung Kew Yoon, Byung Ha Chung, Chul Woo Yang, Mi-La Cho, Jong Young Choi
Recipients of liver transplantation (LT) require long-term immunosuppressive drug treatment, but lifelong immunosuppressive treatment has severe side effects. It is known that some LT recipients develop immune tolerance, and although the development of such operational tolerance should allow a decrease in the burden of immunosuppressive drug treatment, the factors that indicate operational tolerance are not clear. This study aimed to monitor immunological markers over time in LT recipients to identify those markers indicating the development of operational tolerance...
2018: Frontiers in Immunology
Agnieszka Drozdowska-Szymczak, Bronisława Pietrzak, Natalia Czaplińska, Joanna Schreiber-Zamora, Zoulikha Jabiry-Zieniewicz, Mirosław Wielgoś, Bożena Kociszewska-Najman
BACKGROUND Immunosuppressive treatment in pregnant organ recipients can affect functions of the fetal and newborn immune system. The aim of this study was to evaluate the effect of this treatment on selected parameters of the immune system of children born to mothers after liver transplantation. MATERIAL AND METHODS The study included 52 children born to liver recipients and 52 children in the control group. The study was conducted in the 1st Department of Obstetrics and Gynecology, Medical University of Warsaw...
March 16, 2018: Annals of Transplantation: Quarterly of the Polish Transplantation Society
Antonella Mancusi, Sara Piccinelli, Andrea Velardi, Antonio Pierini
FoxP3+ regulatory T cells (Tregs) are a subset of CD4+ T cells that can suppress proliferation and effector functions of T cells, B cells, NK cells, and antigen-presenting cells. Treg deficiency causes dramatic immunologic disease in both animal models and humans. As they are capable to suppress the function and the proliferation of conventional CD4+ and CD8+ T cells, Treg-based cell therapies are under evaluation for the treatment of various autoimmune diseases and are currently employed to prevent graft-versus-host disease (GvHD) in clinical trials of hematopoietic stem cell transplantation...
2018: Frontiers in Immunology
Kevin Rey, Sukhbir Manku, Winnie Enns, Thea Van Rossum, Kevin Bushell, Ryan D Morin, Fiona S L Brinkman, Jonathan C Choy
BACKGROUND: The gut microbiota influences many immunological processes but how its disruption affects transplant rejection is poorly understood. METHODS: Interposition grafting of aortic segments was used to examine vascular rejection. The gut microbiota was disrupted in graft recipients using an antibiotic cocktail (ampicillin, vancomycin, metronidazole, neomycin sulfate) in their drinking water. RESULTS: Treatment of mice with antibiotics severely reduced total bacterial content in the intestine and disrupted the bacterial composition...
March 10, 2018: Transplantation
Clive M Michelo, Bram van Cranenbroek, Peran Touw, Frans H J Claas, Arnold van der Meer, Irma Joosten
Background: Antibody-mediated rejection in solid organ transplantation is an important immunological barrier to successful long-term graft survival. Next to complement activation, natural killer (NK) cells have been implicated in the process. Human cytomegalovirus (CMV), independently associated with decreased graft survival, has a strong imprint on the immune response. Here, we assessed the effect of CMV status on alloreactive NK cell reactivity. Methods: We compared antibody-mediated NK cell cytolytic activity (CD107a expression) and IFNγ production between healthy CMV-seropositive (n = 8) and CMV-seronegative (n = 11) individuals, in cocultures of NK cells with anti-HLA class I or rituximab (control) antibody-coated Raji cells...
December 2017: Transplantation Direct
Junhao Deng, Yiling Zhang, Yong Xie, Licheng Zhang, Peifu Tang
Spinal cord injury (SCI) is an intractable and worldwide difficult medical challenge with limited treatments. Neural stem/progenitor cell (NS/PC) transplantation derived from fetal tissues or embryonic stem cells (ESCs) has demonstrated therapeutic effects via replacement of lost neurons and severed axons and creation of permissive microenvironment to promote repair of spinal cord and axon regeneration but causes ethnical concerns and immunological rejections as well. Thus, the implementation of induced pluripotent stem cells (iPSCs), which can be generated from adult somatic cells and differentiated into NS/PCs, provides an effective alternation in the treatment of SCI...
2018: Stem Cells International
Carla C Baan
Developments in organ preservation techniques, novel immunosuppressants and improved diagnostics have made organ transplantation the success it is today. That does not mean that we are not still striving to perfect techniques, or that there are no more problems to solve. New strategies to address the donor organ shortage, prevent and manage antibody-mediated rejection, lower long-term allograft failure rates and reduce the toxicity of life-long immunosuppressive medication are urgently needed, and are being widely researched...
March 9, 2018: Transplantation
Mitchell A Rees, Nikhil B Amesur, Ruy J Cruz, Amir A Borhani, Kareem M Abu-Elmagd, Guilherme Costa, Anil K Dasyam
Intestinal transplantation has evolved from its experimental origins in the mid-20th century to its status today as an established treatment option for patients with end-stage intestinal failure who cannot be sustained with total parenteral nutrition. The most common source of intestinal failure in both adults and children is short-bowel syndrome, but a host of other disease processes can lead to this common end-point. The development of intestinal transplantation has presented multiple hurdles for the transplant community, including technical challenges, immunologic pitfalls, and infectious complications...
March 2018: Radiographics: a Review Publication of the Radiological Society of North America, Inc
Eleni Theocharidou, Michael A Heneghan
Autoimmune hepatitis occurs in genetically susceptible individuals as a result of loss of immunological tolerance to hepatic autoantigens that can be precipitated by environmental triggers. The clinical manifestation is usually insidious but can be also acute with liver failure. The diagnosis is made on the basis of antibody positivity, elevated immunoglobulin G levels and interface hepatitis on liver histology. Induction of remission is achieved with high-dose steroids in the majority of cases, and maintenance of remission with azathioprine...
March 2, 2018: British Journal of Hospital Medicine
Gulziya Ismailova, Eugene Yenin, Shokan Kaniev, Dinara Bayguisova, Talgat Tajibaev
OBJECTIVES: Hepatocellular carcinoma is the predominant malignancy in patients with cirrhosis and chronic liver disease. Our aim was to assess the morphologic, radiologic, and immunologic charac teristics of hepatocellular carcinoma and liver cirrhosis concerning surgical treatment tactics. MATERIALS AND METHODS: We performed a cross-sectional analysis of a prospective study performed at the JSC National Scientific Center of Surgery (named after A. Syzganov). The study included 58 patients: 31 with hepatocellular carcinoma (53...
March 2018: Experimental and Clinical Transplantation
Jahnavi Aluri, Maya Gupta, Aparna Dalvi, Snehal Mhatre, Manasi Kulkarni, Gouri Hule, Mukesh Desai, Nitin Shah, Prasad Taur, Ramprasad Vedam, Manisha Madkaikar
Major histocompatibility complex (MHC) class II deficiency is a rare autosomal recessive form of primary immunodeficiency disorder (PID) characterized by the deficiency of MHC class II molecules. This deficiency affects the cellular and humoral immune response by impairing the development of CD4+ T helper (Th) cells and Th cell-dependent antibody production by B cells. Affected children typically present with severe respiratory and gastrointestinal tract infections. Hematopoietic stem cell transplantation (HSCT) is the only curative therapy available for treating these patients...
2018: Frontiers in Immunology
Eros Marín, Maria Cristina Cuturi, Aurélie Moreau
Over the past century, solid organ transplantation has been improved both at a surgical and postoperative level. However, despite the improvement in efficiency, safety, and survival, we are still far from obtaining full acceptance of all kinds of allograft in the absence of concomitant treatments. Today, transplanted patients are treated with immunosuppressive drugs (IS) to minimize immunological response in order to prevent graft rejection. Nevertheless, the lack of specificity of IS leads to an increase in the risk of cancer and infections...
2018: Frontiers in Immunology
G Yu, W J Wang, D R Liu, Z F Tao, X Y Hui, J Hou, J Q Sun, X C Wang
Objective: To investigate the clinical characteristics of 8 immunodeficiency cases caused by human recombination activating gene 1 (RAG1) mutations, and to explore the relationship among genotypes, clinical manifestations and immunophenotypes. Methods: Clinical data were collected and analyzed from patients with RAG1 mutations who visited the Department of Clinical Immunology, Children's Hospital of Fudan University between October 2013 and June 2017. The data included clinical manifestations, immunophenotypes and genotypes...
March 2, 2018: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
C L Jay, M M Abecassis
For decades, evidence has been available demonstrating the superiority of kidney transplantation for patients with end-stage renal disease (ESRD) compared with dialysis in terms of improved survival, better quality of life, and long-term cost-effectiveness.(1, 2) Yet, many barriers continue to exist to increasing patient access to kidney transplant through utilization of higher risk deceased donor kidney transplants (DDKT) or blood type (ABO) or immunologically (HLA) incompatible living donor kidney transplants (LDKT)...
March 7, 2018: American Journal of Transplantation
John Wonderlich, Gene Shearer, Alexandra Livingstone, Andrew Brooks, Mark J Soloski, Matthew M Presby
Cytotoxic T cells (CTLs) are important immune effector cells in the adaptive immune response. It has been well documented that CTLs are important in host immune responses to viral and bacterial intracellular pathogens, tumors, and transplanted tissues. The properties of CTLs have been studied extensively in murine models, and their roles validated in the human setting. Frequently, the presence of these cells correlates well with protective immunity, so the ability to readily measure the activity of these cells is an important immunological measurement...
February 21, 2018: Current Protocols in Immunology
Weichen Zhou, Yi Wang, Masayuki Fujino, Leming Shi, Li Jin, Xiao-Kang Li, Jiucun Wang
Murine transplantation models are used extensively to research immunological rejection and tolerance. Here we studied both murine heart and liver allograft models using microarray technology. We had difficulty in identifying genes related to acute rejections expressed in both heart and liver transplantation models using two standard methodologies: Student's t test and linear models for microarray data (Limma). Here we describe a new method, standardized fold change (SFC), for differential analysis of microarray data...
March 2018: FEBS Open Bio
Francisco Boix, Santiago Llorente, Jorge Eguía, Gema Gonzalez-Martinez, Rafael Alfaro, Jose A Galián, Jose A Campillo, María Rosa Moya-Quiles, Alfredo Minguela, Jose A Pons, Manuel Muro
AIM: To validate intracellular cytokine production functional assay as means of cell-mediated immunity monitoring of post-transplant patients with opportunistic infection (OI). METHODS: Intracellular cytokine-producing CD4+ and CD8+ T-cell monitoring was carried out in 30 liver transplant (LTr) and 31 kidney transplant (KTr) recipients from 2010 to 2012. Patients were assessed in our Department of Immunology at the Clinical University 'Hospital Virgen de la Arrixaca-IMIB' in Murcia, Spain for one year following transplantation...
February 24, 2018: World Journal of Transplantation
Jianwu Chen, Dongliang Zhang, Tao Zhang, Chen Chen, Yajuan Song, Shiqiang Liu, Yingjun Su, Shuzhong Guo
BACKGROUND: Vascularized composite allograft (VCA), such as hand and face allograft, contains a vascularized bone component that may provide an immunologic benefit and induce tolerance for the simultaneous inclusion of marrow cells and a marrow microenvironment. We developed a chimeric groin cutaneous/femur flap to investigate the effect of vascularized bone marrow on VCA survival and its ability to induce chimerism. METHODS: Brown Norway and Lewis rats were used as donors and recipients, respectively...
April 2018: Journal of Surgical Research
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